Wave Theory, Wavefronts & Doppler Effect

Wave Theory, Wavefronts & Doppler Effect · Newton's & Huygens' theories of light

• (a)The velocity of light does not change after reflection
• (b)Light travels in a straight line
• (c)The velocity of light in air is greater than in glass
• (d)The velocity of light changes after refraction

Wave Theory, Wavefronts & Doppler Effect · Wavefronts & secondary wavelets

• (a)pushing particles of the medium
• (b)propagating through medium with speed of light
• (c)carrying particles of same phase along with it
• (d)creating secondary wavelets which forms a new wave front

Wave Theory, Wavefronts & Doppler Effect · Reflection & refraction of wavefronts

• (a)$AB > CD$
• (b)$AB < CD$
• (c)$AB = CD$
• (d)$AB >> CD$

Wave Theory, Wavefronts & Doppler Effect · Speed, wavelength & frequency in a medium

• (a)540
• (b)840
• (c)480
• (d)380

Wave Theory, Wavefronts & Doppler Effect · Wavefronts & secondary wavelets

• (a)Both Statement I and Statement II are false
• (b)Both Statement I and Statement II are true
• (c)Statement I is true but Statement II is false
• (d)Statement I is false but Statement II is true

Wave Theory, Wavefronts & Doppler Effect · Reflection & refraction of wavefronts

• (a)$\frac{w}{z}$
• (b)$\frac{z}{w}$
• (c)$\sqrt{\frac{w}{z}}$
• (d)$\sqrt{\frac{z}{w}}$

Wave Theory, Wavefronts & Doppler Effect · Newton's & Huygens' theories of light

• (a)Different colours of light are due to different wavelengths of waves.
• (b)Different colours of light are due to different sizes of the corpuscles.
• (c)Speed of light in denser medium is less than that in rarer medium.
• (d)It can explain laws of reflection and refraction.

Wave Theory, Wavefronts & Doppler Effect · Speed, wavelength & frequency in a medium

• (a)400 nm
• (b)300 nm
• (c)600 nm
• (d)500 nm

Wave Theory, Wavefronts & Doppler Effect · Wavefronts & secondary wavelets

• (a)$\cos^{-1}(2/3)$
• (b)$\cos^{-1}\left(\frac{1}{\sqrt{3}}\right)$
• (c)$\cos^{-1}\left(\frac{1}{3}\right)$
• (d)$\cos^{-1}\left(\sqrt{\frac{3}{2}}\right)$

Wave Theory, Wavefronts & Doppler Effect · Doppler effect of light

• (a)$30\text{ km/s}$
• (b)$60\text{ km/s}$
• (c)$90\text{ km/s}$
• (d)$120\text{ km/s}$

Wave Theory, Wavefronts & Doppler Effect · Wavefronts & secondary wavelets

• (a)perpendicular to the direction of propagation of light.
• (b)parallel to the direction of propagation of light.
• (c)without any specific orientation with direction of propagation of light.
• (d)which has nothing to do with intensity of light.

Wave Theory, Wavefronts & Doppler Effect · Wavefronts & secondary wavelets

• (a)cylindrical
• (b)spherical
• (c)plane
• (d)both spherical and cylindrical

Wave Theory, Wavefronts & Doppler Effect · Reflection & refraction of wavefronts

• (a)increases.
• (b)may increase or decrease.
• (c)decreases.
• (d)remains unchanged.

Wave Theory, Wavefronts & Doppler Effect · Ray optics limit, colours & scattering

• (a)spherical aberration
• (b)distortion
• (c)coma
• (d)chromatic aberration

Wave Theory, Wavefronts & Doppler Effect · Ray optics limit, colours & scattering

• (a)Yellow, Orange and Red
• (b)All
• (c)Orange, Red and Violet
• (d)Blue, Green and Yellow

Wave Theory, Wavefronts & Doppler Effect · Doppler effect of light

• (a)3 $\times$ 108 ms${}^{-1}$
• (b)3 $\times$ 1010 ms${}^{-1}$
• (c)3.13 $\times$ 105 ms${}^{-1}$
• (d)4.48 $\times$ 105 ms${}^{-1}$

Wave Theory, Wavefronts & Doppler Effect · Doppler effect of light

Numerical answer type. Work it out, then open the answer.

Wave Theory, Wavefronts & Doppler Effect · Doppler effect of light

• (a)306 km/sec
• (b)322 km/sec
• (c)296 km/sec
• (d)336 km/sec

Wave Theory, Wavefronts & Doppler Effect · Speed, wavelength & frequency in a medium

• (a)Velocity
• (b)Wavelength
• (c)Momentum
• (d)Energy

Wave Theory, Wavefronts & Doppler Effect · Doppler effect of light

• (a)becoming orange.
• (b)shining yellow.
• (c)gradually changing to blue.
• (d)gradually changing to red.

Wave Theory, Wavefronts & Doppler Effect · Reflection & refraction of wavefronts

• (a)bends down wards
• (b)bends upwards
• (c)becomes narrower
• (d)goes horizontally without any deflection

Wave Theory, Wavefronts & Doppler Effect · Ray optics limit, colours & scattering

• (a)the scattering of light
• (b)the polarisation of light
• (c)the colour of the sun
• (d)the colour of the sky

Wave Theory, Wavefronts & Doppler Effect · Reflection & refraction of wavefronts

• (a)convex
• (b)concave
• (c)convex near the axis and concave near the periphery
• (d)planar

Wave Theory, Wavefronts & Doppler Effect · Speed, wavelength & frequency in a medium

• (a)1.50
• (b)3.00
• (c)1.33
• (d)1.40

Wave Theory, Wavefronts & Doppler Effect · Speed, wavelength & frequency in a medium

• (a)$\lambda = \lambda$ = $\lambda$'
• (b)n = n'
• (c)v = v'
• (d)$I = I$'.

Wave Theory, Wavefronts & Doppler Effect · Doppler effect of light

• (a)25 Å
• (b)100 Å
• (c)zero
• (d)2.5 Å

Wave Theory, Wavefronts & Doppler Effect · Ray optics limit, colours & scattering

• (a)much smaller than the wavelength of light
• (b)of the same order as the wavelength of light
• (c)of the order of one millimetre
• (d)much larger than the wavelength of light

Wave Theory, Wavefronts & Doppler Effect · Ray optics limit, colours & scattering

• (a)much smaller than the wavelength of light
• (b)of the same order as the wavelength of light
• (c)of the order of one millimetre
• (d)much larger than the wavelength of light

Wave Theory, Wavefronts & Doppler Effect · Newton's & Huygens' theories of light

• (a)Refraction
• (b)Reflection
• (c)Diffraction
• (d)Origin of spectra